LP339DE4 Equivalent & Substitute Parts

Part Overview

The LP339DE4 is a general-purpose quad comparator IC manufactured by Texas Instruments in 14-SOIC surface-mount packaging. This device features CMOS, MOS, and open-collector output configurations suitable for analog signal comparison applications across industrial and commercial temperature ranges (0°C to 70°C). The LP339DE4 is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while ensuring continued design support and supply chain availability.

Key Parameters

Parameter	LP339DE4 Specification
Manufacturer	Texas Instruments
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	4
Output Type	CMOS, MOS, Open-Collector
Voltage - Supply, Single/Dual (±)	3V ~ 30V, ±1.5V ~ 15V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.025µA @ 5V
Current - Output (Typ)	30mA @ 5V
Current - Quiescent (Max)	100µA
Operating Temperature	0°C ~ 70°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LP339DE4 is determined by the following critical parameters:

Mechanical Compatibility: Package type (14-SOIC with 0.154" width, 3.90mm), mounting type (surface mount), and pin count (14 pins) must match exactly to ensure PCB footprint compatibility without layout redesign.

Electrical Compatibility: Supply voltage range, input offset voltage, input bias current, output current capability, and quiescent current must equal or exceed the LP339DE4 specifications to maintain circuit performance. Output type (CMOS, MOS, Open-Collector) must be compatible with the application's pull-up or load requirements.

Functional Equivalence: All substitute parts must be quad comparators (4 elements) with general-purpose application suitability and identical functional architecture.

Compliance & Availability: RoHS3 compliance and MSL rating ensure regulatory conformance and handling compatibility. Product status (Active or Last Time Buy) indicates supply chain viability.

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage (±)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status
LP339DE4	Texas Instruments	14-SOIC	CMOS, MOS, Open-Collector	3V~30V, ±1.5V~15V	5mV @ 30V	0.025µA @ 5V	30mA @ 5V	100µA	0°C ~ 70°C	Discontinued
LP339M/NOPB	Texas Instruments	14-SOIC	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	Active
LP339MX/NOPB	Texas Instruments	14-SOIC	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	Active
LP339D	Texas Instruments	14-SOIC	CMOS, MOS, Open-Collector	3V~30V, ±1.5V~15V	5mV @ 30V	0.025µA @ 5V	30mA @ 5V	100µA	0°C ~ 70°C	Last Time Buy
LM339M/NOPB	Texas Instruments	14-SOIC	Open-Collector	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active
LMV339M/NOPB	Texas Instruments	14-SOIC	CMOS, Open-Collector, TTL	2.7V~5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	300µA	-40°C ~ 85°C	Active
BA2901SF-E2	Rohm Semiconductor	14-SOP	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM139ADT	STMicroelectronics	14-SOIC	Not Specified	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	Active
LM139DT	STMicroelectronics	14-SOIC	Not Specified	2V~32V, ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	Active
LM2901HYDT	STMicroelectronics	14-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	Not Specified	Not Specified	Not Specified	2.5mA	Not Specified	Active
LM339ADT	STMicroelectronics	14-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active

Engineering Selection Recommendations

Primary Substitutes (Texas Instruments LP339 Series):

LP339M/NOPB and LP339MX/NOPB are direct functional equivalents with identical output type and operating temperature range. Both are Active products with superior supply availability (1935 and 3454 units respectively). The expanded supply voltage range (2V–36V vs. 3V–30V) provides additional design flexibility. Output current is reduced to 10mA, requiring verification that application load requirements do not exceed this specification. Both maintain ROHS3 compliance and MSL-1 rating.

LP339D is electrically and functionally identical to LP339DE4 with matching supply voltage, output current, and quiescent current specifications. Product status is Last Time Buy, indicating limited future availability. This part is suitable only for immediate procurement requirements.

Secondary Substitutes (Texas Instruments LM339 Series):

LM339M/NOPB is an Active product with expanded supply voltage range and lower quiescent current (2.5mA vs. 100µA). Output type is restricted to open-collector only, eliminating CMOS and MOS output options. Input bias current is 10× higher (0.25µA vs. 0.025µA). This part is suitable only for applications requiring open-collector output exclusively.

LMV339M/NOPB operates at reduced supply voltage (2.7V–5.5V) with extended temperature range (-40°C to 85°C). Quiescent current is elevated (300µA). This part is suitable only for low-voltage applications with TTL/CMOS logic interface requirements.

Cross-Manufacturer Substitutes:

BA2901SF-E2 (Rohm Semiconductor) provides open-collector output with extended temperature range (-40°C to 105°C) and improved quiescent current (2mA). Package is 14-SOP with 0.173" width (vs. 0.154" for LP339DE4), requiring PCB footprint verification before substitution.

LM139ADT and LM139DT (STMicroelectronics) are Active products with extended temperature range (-55°C to 125°C) and lower input offset voltage (2mV–5mV). Supply voltage range is slightly reduced (2V–32V vs. 3V–30V). Output type specification is not provided; verification with manufacturer datasheet is required before selection.

LM2901HYDT (STMicroelectronics) is an automotive-grade part (AEC-Q100 qualified) with MSL-3 rating. Multiple electrical parameters are not specified in available documentation. This part is suitable only for automotive applications with formal qualification requirements.

LM339ADT (STMicroelectronics) is an Active product with extended temperature range (0°C to 70°C matching LP339DE4) and multiple output type options. Input offset voltage is superior (2mV vs. 5mV). This part provides the broadest compatibility with LP339DE4 specifications.

Frequently Asked Questions (FAQ)

Q: Can LP339M/NOPB or LP339MX/NOPB directly replace LP339DE4 without circuit modification?

A: Both parts are mechanically and functionally compatible with identical 14-SOIC packaging and pin configuration. Output current is reduced from 30mA to 10mA. Verify that application load impedance does not require current exceeding 10mA. Supply voltage range is expanded, providing additional design margin. No circuit modification is required if output current specification is satisfied.

Q: What is the difference between LP339MX/NOPB and LP339M/NOPB?

A: Both parts are electrically identical. LP339MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® packaging with 3454 units in stock. LP339M/NOPB is supplied in Tube packaging with 1935 units in stock. Selection depends on assembly process requirements and supply chain availability.

Q: Why is LM339M/NOPB not recommended as a primary substitute?

A: LM339M/NOPB restricts output type to open-collector only, eliminating CMOS and MOS output options available in LP339DE4. Input bias current is 10× higher (0.25µA vs. 0.025µA), potentially affecting high-impedance input circuits. This part is suitable only for applications requiring open-collector output exclusively.

Q: Can BA2901SF-E2 be used as a substitute despite different package width?

A: BA2901SF-E2 uses 14-SOP packaging with 0.173" width versus 0.154" width for LP339DE4. PCB footprint compatibility must be verified with layout design before substitution. Pin pitch and lead configuration must match existing PCB artwork. Mechanical compatibility cannot be assumed without detailed package comparison.

Q: What is the significance of MSL rating in substitute selection?

A: LP339DE4 has MSL-1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling. LM2901HYDT has MSL-3 (168 Hours) rating, requiring controlled humidity storage and time-limited exposure before reflow soldering. MSL mismatch may require modified assembly procedures and increased material handling costs.

Q: Are STMicroelectronics LM139 series parts fully compatible with LP339DE4?

A: LM139ADT and LM139DT are mechanically compatible (14-SOIC packaging) with extended temperature range (-55°C to 125°C). Output type specification is not provided in available documentation. Supply voltage range is slightly reduced (2V–32V vs. 3V–30V). Formal datasheet review is required to confirm output type compatibility and verify all electrical specifications before design implementation.

Q: What is the advantage of LMV339M/NOPB for low-voltage applications?

A: LMV339M/NOPB operates at reduced supply voltage (2.7V–5.5V) with extended temperature range (-40°C to 85°C). Output current is significantly higher (84mA vs. 30mA). This part is designed for TTL/CMOS logic interface applications. Quiescent current is elevated (300µA), affecting power consumption in battery-powered designs. Selection is appropriate only for applications requiring low-voltage operation with high output current capability.

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